Nonequivalent
Part of speech: adjective
Definition: Not equivalent; different.
Unequal
Part of speech: adjective
Definition: Not the same.Out of balance.
Example sentence: I should like to suggest to you that the cause of all the economic troubles is that we have an economic system which tries to maintain an equality of value between two things, which it would be better to recognise from the beginning as of unequal value.